Computer Science – Sound
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm13a1640n&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM13A-1640
Computer Science
Sound
2455 Particle Precipitation, 2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions (2431), 2764 Plasma Sheet, 2788 Magnetic Storms And Substorms (7954)
Scientific paper
During a large geomagnetic storm occurred on 15 May 2005, the FAST satellite encountered a local onset of substorm identified by the far ultraviolet (FUV) imager onboard the IMAGE satellite. At this time, FAST observed Broad-Band Electrons (BBEs), which were electron flux enhancements over a broad energy range (50 eV-30 keV) at the lower latitude side of the auroral oval (-58°--65° ILAT in this BBE event). Ground-based magnetograms measured a geomagnetic H-bay and Pi2 pulsations started around the post-midnight sector at ~0655 UT. At the same time, energetic particle injections were observed by the geosynchronous LANL satellite. The auroral intensification identified by IMAGE-FUV started at 0655 UT at a magnetic local time (MLT) of ~3 h. From 3 min after the onset, FAST observed the BBEs at 0658-0703 UT, 3 MLT, and -58°--65° ILAT (footprint of -54°--60°MLAT) above the auroral emission region. These data clearly show that the BBEs occur at the auroral brightening region at the onset of a storm-time substorm. The auroral emission region due to the precipitation of the BBEs lasted for ~10 min at ~-50°--60° MLAT and ~3-6 MLT. In this presentation, we also report spatial relationships between BBEs and the plasmapause in order to investigate the source region of the BBEs for 8 events selected from the BBE event list created in previous multi-event studies using the data from the Plasma Wave and Sounder (PWS) experiments on board the Akebono satellite.
Carlson Carl W.
Frey Harald U.
Kumamoto Akihito
McFadden James P.
Nakajima Aki
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